[SOLVED] Latest iOS compatible with High Sierra ?

[rlesperance]

My iMac (2009) runs OS 10.13. Where can I find what is the latest iOS that my computer can manage ?

 

[spinningstill]

Find the iMac you have here:
https://support.apple.com/en-us/HT201634

Then go to preferences and check for updates. It will generally give you an updated version you can go to.

Check this too:
https://discussions.apple.com/thread/8213234

Grace and peace.